James Mattis Just Out-Trumped Trump on North Korea

The U.S. defense secretary has upped the ante on the president's most bellicose rhetoric, making war more likely than ever.

WASHINGTON, DC - JUNE 13:  U.S. Defense Secretary James Mattis testifies before the Senate Armed Services Committee during a hearing in the Dirksen Senate Office Building on Capitol Hill June 13, 2017 in Washington, DC. Mattis and other Pentagon leaders testified about the proposed FY2018 National Defense Authorization Budget Request.  (Photo by Chip Somodevilla/Getty Images)
WASHINGTON, DC - JUNE 13: U.S. Defense Secretary James Mattis testifies before the Senate Armed Services Committee during a hearing in the Dirksen Senate Office Building on Capitol Hill June 13, 2017 in Washington, DC. Mattis and other Pentagon leaders testified about the proposed FY2018 National Defense Authorization Budget Request. (Photo by Chip Somodevilla/Getty Images)
WASHINGTON, DC - JUNE 13: U.S. Defense Secretary James Mattis testifies before the Senate Armed Services Committee during a hearing in the Dirksen Senate Office Building on Capitol Hill June 13, 2017 in Washington, DC. Mattis and other Pentagon leaders testified about the proposed FY2018 National Defense Authorization Budget Request. (Photo by Chip Somodevilla/Getty Images)

U.S. Defense Secretary James Mattis delivered a pithy response on Sunday to North Korea’s nuclear test earlier that day. This was the core of the statement: “Any threat to the United States or its territories including Guam or our allies will be met with a massive military response, a response both effective and overwhelming.”

U.S. Defense Secretary James Mattis delivered a pithy response on Sunday to North Korea’s nuclear test earlier that day. This was the core of the statement: “Any threat to the United States or its territories including Guam or our allies will be met with a massive military response, a response both effective and overwhelming.”

Global markets barely moved upon opening on Monday, which was consistent with the broader treatment of these words as just more of the same from Washington. But that is to misinterpret Mattis, whose words represent a significant escalation in U.S. policy: The probability of a U.S. strike on North Korea has clearly risen.

Compare Mattis’ statement with the key part of Donald Trump’s remarks on August 8, in which the president said, “North Korea best not make any more threats to the United States. They will be met with fire and fury like the world has never seen.”

First, context. On August 8, Trump spoke off the cuff from a golf club during a discussion on opioids, which left ambiguous how far his words represented the administration’s position. Mattis spoke outside the White House, flanked by the chairman of the Joint Chiefs of Staff, Marine General Joseph Dunford, in a scripted statement, in which each word had clearly been carefully chosen.

Second, speaker. We have become accustomed to Trump’s remarks being contradicted by members of his administration, or by his own subsequent statements. But not so with Mattis, who is one of the most highly respected military officers of his generation. When Mattis speaks, you listen to each word. And the two key words in Mattis’ statement were “will be”: Not “might be”, but will be. That tells us that if North Korea makes a threat that meets the administration’s definition, the next step is a U.S. strike, rather than more diplomacy.

Third, scope. Trump said on August 8 that threats “to the United States” would trigger a U.S. military response. Since then, North Korea has threatened Guam, an unincorporated U.S. territory, and flown a missile over Japan, but has been careful not to cross Trump’s line by threatening the U.S. mainland directly. Mattis’ statement makes clear that now any threat to Guam or U.S. allies like South Korea or Japan will trigger a U.S. strike. So the bar for what will trigger a U.S. strike has been lowered.

Fourth, detail. Trump’s “fire and fury like the world has never seen” can be interpreted in many ways, if indeed it is even understood as a statement of policy, not just rhetoric. Conversely, from Mattis’ precise statement, we can now deduct the outline of what a U.S. strike would look like.

Thus, Mattis asserted that “we are not looking to the total annihilation of a country, namely, North Korea”. Translation: a U.S. strike would target North Korean nuclear and military assets, rather than destroy the whole country, and is unlikely to involve any U.S. invasion; but such a U.S. strike would nonetheless be massive and sudden, and without further warning, if North Korea were to make the threat in question.

Furthermore, Mattis ended his statement by clearly noting the U.S. preference for a diplomatic solution: “Kim Jong Un should take heed the United Nations Security Council’s unified voice. All members unanimously agreed on the threat North Korea poses. And they remain unanimous in their commitment to the denuclearization of the Korean peninsula.”

In sum, it seems clear that Mattis wants a peaceful solution as a primary objective, but is ready to strike North Korean nuclear and military installations if Pyongyang makes any further threat to the U.S. or its allies.

However, Mattis was careful to leave a safety valve in the language he used. His statement leaves the Trump administration room to maneuver in the definition of the term “any threat”. Thus, such language could be interpreted by the administration to either include or exclude merely verbal threats, or indeed, any other type.

But Mattis’ use of the term “any threat” may have been designed to anticipate a justification to use force in self-defense under Article 51 of the U.N. Charter, which is understood to require an imminent threat of “armed attack” against which action can then be taken in self-defense, if that attack has not yet begun. Note that action taken under Article 51 does not require prior U.N. Security Council approval.

Furthermore, we should recognize that while Mattis’ words give us the most precise account of the Trump administration’s position on North Korea to date, there may well remain substantial differences within the administration. The UN Security Council meets Monday, and it is possible that U.S. Permanent Representative to the United Nations Nikki Haley and U.S. Secretary of State Rex Tillerson can craft an alternative diplomatic path.

Kim Jong Un’s demurral from threatening the United States mainland after Trump’s August 8 remarks may indicate that he takes Washington’s rhetoric seriously, and that he acts relatively rationally. But now Mattis has extended the precision of the U.S. position to include North Korean threats to U.S. allies, and used the words “will be” in a formal context, Kim Jong Un has been pushed into a tighter corner.

So let’s be clear: Yesterday was not more of the same. The probability of a U.S. strike on North Korea has gone up in the last 48 hours. The ball is in Kim Jong Un’s court, and he has a history of taking wild swings. If he says the wrong thing now, the next step could well be violent. If that happens, don’t say Mattis didn’t warn you.

Photo credit: Pool/Getty Images

Emile Simpson is a former British Army officer and the author of War From the Ground Up: Twenty-First Century Combat as Politics. Twitter: @emile_simpson

More from Foreign Policy

An illustration shows the Statue of Liberty holding a torch with other hands alongside hers as she lifts the flame, also resembling laurel, into place on the edge of the United Nations laurel logo.
An illustration shows the Statue of Liberty holding a torch with other hands alongside hers as she lifts the flame, also resembling laurel, into place on the edge of the United Nations laurel logo.

A New Multilateralism

How the United States can rejuvenate the global institutions it created.

A view from the cockpit shows backlit control panels and two pilots inside a KC-130J aerial refueler en route from Williamtown to Darwin as the sun sets on the horizon.
A view from the cockpit shows backlit control panels and two pilots inside a KC-130J aerial refueler en route from Williamtown to Darwin as the sun sets on the horizon.

America Prepares for a Pacific War With China It Doesn’t Want

Embedded with U.S. forces in the Pacific, I saw the dilemmas of deterrence firsthand.

Chinese Foreign Minister Wang Yi, seen in a suit and tie and in profile, walks outside the venue at the Belt and Road Forum for International Cooperation. Behind him is a sculptural tree in a larger planter that appears to be leaning away from him.
Chinese Foreign Minister Wang Yi, seen in a suit and tie and in profile, walks outside the venue at the Belt and Road Forum for International Cooperation. Behind him is a sculptural tree in a larger planter that appears to be leaning away from him.

The Endless Frustration of Chinese Diplomacy

Beijing’s representatives are always scared they could be the next to vanish.

Turkey's President Recep Tayyip Erdogan welcomes Crown Prince of Saudi Arabia Mohammed bin Salman during an official ceremony at the Presidential Complex in Ankara, on June 22, 2022.
Turkey's President Recep Tayyip Erdogan welcomes Crown Prince of Saudi Arabia Mohammed bin Salman during an official ceremony at the Presidential Complex in Ankara, on June 22, 2022.

The End of America’s Middle East

The region’s four major countries have all forfeited Washington’s trust.